Ammonia as N Back Catalog number: 59239 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79215 Acetonitrile Price on request 43014 1-Fluoronaphthalene Price on request S-4415-20-100PE ISO 9377-2MOD Extraction Solvent Stock Solution I 20ul of n-Heptane and 20mg of n-Tetracontane solved in 1000ml n-Pentane Price on request